PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-01:42:40
G02     37.6           51.1                9.9 +/-    0.64      12.3 +/-    0.64  0.040 / 0.060
G05     127.0          65.7               12.0 +/-    0.52      13.0 +/-    0.52  0.040 / 0.050
G06     55.1           14.8                8.1 +/-    2.12      20.1 +/-    2.12  0.040 / 0.040
G12     199.0          65.3               13.2 +/-    1.08      14.4 +/-    1.08  0.030 / 0.040
G25     289.0          56.4               10.6 +/-    1.59      12.5 +/-    1.59  0.030 / 0.040
G29     312.4          34.8                9.7 +/-    0.85      15.4 +/-    0.85  0.030 / 0.040